The synthesis of (-)-acetomycin 1, a highly functionalized gamma-lactone with antitumor activity, was achieved in five steps with nearly complete enantioselectivity. The key step was realized by a large scale lipase R catalyzed esterification of 5-hydroxy-4-methyl-2(5H)-furanone 2 providing (-)-(5R)-5-acetoxy-4-methyl-2(5H)-furanone 3 with an e.e., of 99%. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
Lipase catalyzed enantioselective transesterification of 5-acyloxy-2(5H)-furanones
作者:Hanneke van der Deen、Robert P. Hof、Arjan van Oeveren、Ben L. Feringa、Richard M. Kellogg
DOI:10.1016/s0040-4039(00)74428-5
日期:1994.11
Several lipases catalyse the transesterification of γ-acyloxyfuranones in organic solvents with high enantioselectivities. This method has been used for the kineticresolution of 5-acetoxy-2(5H)-furanone, 5-acetoxy-4-methyl-2(5H)-furanone and 5-propionyloxy-2(5H)-furanone, in e.e.'s ranging from 68–98%.